Patent GB-433798-A (GB)
Title: Improvements in and relating to control devices for the winding gear of pit cages and the like
IPC: B66B1/12
Filed: 1934-02-26
Abstract: 433,798. Winding - apparatus. MANCHESTER COLLIERIES, Ltd., Walkden, Manchester, and GREENHALGH, S., Gilden Hollins, Little Hulton, Bolton. Feb. 26, 1934, No. 6140. [Class 78 (v)] [See also Group XXXII] In a reversible winding-apparatus having a main controller sensitive to the speed or position or both speed and position of the load for cutting off the power from the winding engine, a device is brought into operation, upon actuation of the main controller, to operate the reversing mechanism of the engine according to the position of the load in its path. In the form shown in Fig. 1, the main controller is connected by a rod 14 to a bellcrank 25 of which one arm bears on a shaft 29 which is connected by a link 10 to the joint of a pair of toggle links 9. The toggle links are pivoted to blocks 5, 6 slidably mounted on a rod 2 which is slidably mounted and is connected to the reverser mechanism of the machine. The toggle links normally maintain the blocks 5, 6 apart against the force of springs 7, 8 which may be adjusted by nuts 3, 4, and a traveller 15, driven by the screwed shaft 16 through reduction gear from the winding mechanism, normally reciprocates in the space between the blocks without contacting therewith. When the main controller operates, however, the toggle is broken and the blocks 5, 6 approach one another and grip the traveller 15 between them. Further movement of the traveller shifts, through the rod 2, the reverser mechanism either to neutral or to the opposite position to that in which it was previously set, according to the position occupied by the traveller when the blocks 5, 6 contacted therewith. A dashpot may be used to cushion the approaching movement of the blocks. The blocks may be replaced by a pair of levers mounted on a common pivot with their free ends connected and spaced apart by a pair of toggle links. The levers are constantly oscillated from the winding mechanism without normally contacting with a lever connected to the reversing mechanism. When, however, the toggle is broken by the operation of the main controller, the levers approach one another and pull or push the lever connected to the reversing mechanism to operate the latter. In the form shown in Fig. 6, the main controller, through the rod 14 normally latches a lever 52 in the position shown. One arm of the lever is linked to a slide 46 working in a guide 47 secured to a toothed sector 48 and connected by a rod 45 to the lower end of the reverser lever 40 through a lost motion connection 42, 43. The quadrant 48 is geared to a shaft 50 driven through reduction gear from the winding mechanism. One arm of the lever 52 is connected by a rod 62 to a lever 61 operating the usual lever latch 59. The quadrant normally rocks about a centre coincident with that occupied by the slider 46 in the position shown. When, however, the main controller releases the latch 55 the weighted lever 52 pushes the slider downwardly and the angular motion of the quadrant pushes or pulls the rod 45 to actuate the reverser lever 40. The dashpot may comprise two concentric cylinders 30, 31 filled with oil, the inner one being provided with a piston 32 and holes 34-37 of successively smaller diameter towards the closed end whereby the passage for the oil is successively diminished as the members to be cushioned more nearly approach one another.